<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="http://localhost:8080/socket.io/socket.io.js"></script>
</head>
<body>
    aaa
    <script>
        let socket = io.connect("ws://localhost:8080/");
        socket.emit('aaa',12,5,8);
        socket.on('ser',a=>{
            console.log(a);
        })
    </script>
</body>
</html>